using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace BuilderPattern

{

class Program

{

static void Main(string[] args)

{

Director director=new Director();

Builder b1=new ConcreteBuilder1();

Builder b2 = new ConcreteBuilder2();

director.Construct(b1);

var product1 = b1.GetResult();

product1.Show();

director.Construct(b2);

var product2 = b2.GetResult();

product2.Show();

}

}

/// <summary>

/// The 'Director' class

/// </summary>

class Director

{

// Builder uses a complex series of steps

public void Construct(Builder builder)

{

builder.BuildPartA();

builder.BuildPartB();

}

}

/// <summary>

/// The 'Builder' abstract class

/// </summary>

abstract class Builder

{

public abstract void BuildPartA();

public abstract void BuildPartB();

public abstract Product GetResult();

}

/// <summary>

/// The 'ConcreteBuilder1' class

/// </summary>

class ConcreteBuilder1 : Builder

{

private Product _product = new Product();

public override void BuildPartA()

{

_product.Add("PartA");

}

public override void BuildPartB()

{

_product.Add("PartB");

}

public override Product GetResult()

{

return _product;

}

}

/// <summary>

/// The 'ConcreteBuilder2' class

/// </summary>

class ConcreteBuilder2 : Builder

{

private Product _product = new Product();

public override void BuildPartA()

{

_product.Add("PartX");

}

public override void BuildPartB()

{

_product.Add("PartY");

}

public override Product GetResult()

{

return _product;

}

}

/// <summary>

/// The 'Product' class

/// </summary>

class Product

{

private List<string> _parts = new List<string>();

public void Add(string part)

{

_parts.Add(part);

}

public void Show()

{

Console.WriteLine("\nProduct Parts -------");

foreach (string part in _parts)

Console.WriteLine(part);

}

}

}